That does seem like a lot even for direct sun at 40 CYA. What is your pool temp?

I would bump your FC up targeting 6 or so tonight. Test after it's circulated for 30 minutes, then test early tomorrow morning. Overnight chlorine lost test (OCLT). You should not lose more than 1 ppm overnight. If you pass that, I'd go up to 50 CYA and see if that helps.
 
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